Finding the Third Proportional to 38,991 and 55,570

Step by Step Solution

1. Step 1: Write the proportion equation
   38,991 : 55,570 = 55,570 : x
2. Step 2: Convert to fraction form
   38,991/55,570 = 55,570/x
3. Step 3: Cross multiply
   38,991x = 55,570 × 55,570
4. Step 4: Simplify right side
   38,991x = 3,088,024,900
5. Step 5: Solve for x
   x = 3,088,024,900/38,991
6. Step 6: Final answer
   x = 79,198.40